Replace deprecated tenant_id property

The tenant_id property of RestClient in tempest was deprecated in
25.0.0. This replaces the deprecated property by the new project_id
property to avoid the following warning.

WARNING tempest.lib.common.rest_client [-] Deprecated: "tenant_id"
property is deprecated for removal, use "project_id" instead

Depends-on: https://review.opendev.org/c/openstack/tempest/+/707938
Change-Id: Ie3c32f9f2278b78603a4214c5717df8691ba490a
diff --git a/neutron_tempest_plugin/scenario/test_dvr.py b/neutron_tempest_plugin/scenario/test_dvr.py
index fa2e9d4..a37abf4 100644
--- a/neutron_tempest_plugin/scenario/test_dvr.py
+++ b/neutron_tempest_plugin/scenario/test_dvr.py
@@ -64,7 +64,7 @@
         The test is done by putting the SNAT port down on controller node.
         """
         router = self.create_router_by_client(
-            distributed=True, tenant_id=self.client.tenant_id, is_admin=True,
+            distributed=True, tenant_id=self.client.project_id, is_admin=True,
             ha=False)
         self.setup_network_and_server(router=router)
         self._check_snat_port_connectivity()